5-8Geometry

import math

def sqcube():
  s = float(raw_input('enter length of one side: '))
  print 'the area is:', s ** 2., '(units squared)'
  print 'the volume is:', s ** 3., '(cubic units)'
def cirsph():
  r = float(raw_input('enter length of radius: '))
  print 'the area is:', math.pi * (r ** 2.),'(units squared)'
  print 'the volume is:', (4. / 3.) * math.pi * (r **3.), '(cubic units)'

5-11Modules

(a) 使用循环和算术运算,求出 0-20 之间的所有偶数

for i in range(0,22,2):

  print i

or

for i in range(22):

  if i%2 ==0:

    print i

(b) 同上,不过这次输出所有的奇数

for i in range(1,20,2):

  print i

or

for i in range(20):

  if i%2 !=0:

    print i

05-11 17:14